| Sage Weil | 58bb3b3 | 2009-12-23 12:12:31 -0800 | [diff] [blame] | 1 | #ifndef __FS_CEPH_PAGELIST_H |
| 2 | #define __FS_CEPH_PAGELIST_H |
| 3 | |
| 4 | #include <linux/list.h> |
| 5 | |
| 6 | struct ceph_pagelist { |
| 7 | struct list_head head; |
| 8 | void *mapped_tail; |
| 9 | size_t length; |
| 10 | size_t room; |
| 11 | }; |
| 12 | |
| 13 | static inline void ceph_pagelist_init(struct ceph_pagelist *pl) |
| 14 | { |
| 15 | INIT_LIST_HEAD(&pl->head); |
| 16 | pl->mapped_tail = NULL; |
| 17 | pl->length = 0; |
| 18 | pl->room = 0; |
| 19 | } |
| 20 | extern int ceph_pagelist_release(struct ceph_pagelist *pl); |
| 21 | |
| 22 | extern int ceph_pagelist_append(struct ceph_pagelist *pl, void *d, size_t l); |
| 23 | |
| 24 | static inline int ceph_pagelist_encode_64(struct ceph_pagelist *pl, u64 v) |
| 25 | { |
| 26 | __le64 ev = cpu_to_le64(v); |
| 27 | return ceph_pagelist_append(pl, &ev, sizeof(ev)); |
| 28 | } |
| 29 | static inline int ceph_pagelist_encode_32(struct ceph_pagelist *pl, u32 v) |
| 30 | { |
| 31 | __le32 ev = cpu_to_le32(v); |
| 32 | return ceph_pagelist_append(pl, &ev, sizeof(ev)); |
| 33 | } |
| 34 | static inline int ceph_pagelist_encode_16(struct ceph_pagelist *pl, u16 v) |
| 35 | { |
| 36 | __le16 ev = cpu_to_le16(v); |
| 37 | return ceph_pagelist_append(pl, &ev, sizeof(ev)); |
| 38 | } |
| 39 | static inline int ceph_pagelist_encode_8(struct ceph_pagelist *pl, u8 v) |
| 40 | { |
| 41 | return ceph_pagelist_append(pl, &v, 1); |
| 42 | } |
| 43 | static inline int ceph_pagelist_encode_string(struct ceph_pagelist *pl, |
| 44 | char *s, size_t len) |
| 45 | { |
| 46 | int ret = ceph_pagelist_encode_32(pl, len); |
| 47 | if (ret) |
| 48 | return ret; |
| 49 | if (len) |
| 50 | return ceph_pagelist_append(pl, s, len); |
| 51 | return 0; |
| 52 | } |
| 53 | |
| 54 | #endif |